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MO: Molekülphysik

MO 1: Posters Monday: Clusters, Fullerenes and Nanotubes

MO 1.23: Poster

Montag, 2. April 2001, 12:30–15:00, AT3

Electron-impact induced fragmentation of fullerene ions — •D. Hathiramani¹, P. Scheier², K. Aichele¹, W. Arnold¹, K. Huber¹, L.P. Presnyakov³, D.B. Uskov³, and E. Salzborn¹ — ¹Institut für Kernphysik, Justus–Liebig–Universität Gießen, D-35392 Gießen, Germany — ²Institut für Ionenphysik, Leopold Franzens Universität, A-6020 Innsbruck, Austria — ³P.N.Lebedev Physical Institute, 117924 Moscow, Russia

The C₂-fragmentation of fullerene ions C₆₀^q+ (q=1, 2, 3) induced by electron impact was studied for the first time. The cross sections for the loss of a C₂ fragment indicate the presence of two different processes. At low electron energies the projectile electron leads to the direct excitation of the giant plasmon resonance. At electron energies larger than 100 eV the fragmentation of the fullerene ions can be described as an unsuccessful ionization. Only this second part of the cross section shows a dependence on the charge state q of the precursor ion.